renovate/lib/modules/manager/haskell-cabal/readme.md

Supports dependency extraction from build-depends fields in Cabal package description files. They use the extension .cabal, and are used with the Haskell programming language.

Limitations:

• The dependencies of all components are mushed together in one big list.
• Fields like pkgconfig-depends and build-tool-depends are not handled.
• The default PVP versioning is subject to limitations.

If you need to change the versioning format, read the versioning documentation to learn more.